| Door will not open | Report its position, operating method, and any visible control message from the floor. | Curtain, guide, counterbalance, hoist, operator, control, or enabled safety condition may need assessment. | Do not force the curtain, pull a release, or repeatedly command the operator. |
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| Door will not close | Note the open position and whether a control or indicator changed during ordinary use. | Several mechanical, electrical, safety-input, or sequence conditions are possible. | Secure the area under facility procedure and request assessment. |
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| Curtain binds in a guide | From clear floor space, report the side and approximate height where movement stopped. | Guide alignment, curtain damage, endlocks, bottom bar, or another assembly condition may be involved. | Do not pry the curtain, loosen the guide, or cycle the door again. |
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| Slats are bent or separated | Describe the affected area and whether the curtain remains inside both guides. | The curtain and connected guides or endlocks may require inspection. | Do not handle slats or run the damaged area into the hood. |
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| Bottom bar is crooked | Note which side is lower and whether the bar or astragal is visibly damaged. | Curtain alignment, guide, bottom-bar, or operating-system conditions may be present. | Keep clear and do not pull the bar level. |
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| Door stops during travel | Report the direction, stopping height, and any indicator seen during the ordinary cycle. | Mechanical resistance, operator control, safety input, or counterbalance condition may require assessment. | Do not cycle the equipment to reproduce the stop. |
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| Opening cannot be secured | Report the remaining opening and visible curtain or bottom-bar position. | Damage may involve the curtain, guides, bottom bar, operating system, or attachments. | Apply facility access-control procedures without handling the door assembly. |
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| Operator fault is displayed | Record the displayed text or code and the door position without opening a control enclosure. | The operator, wiring, a safety input, or an interlocked condition may be involved. | Do not reset repeatedly, bypass the input, or open guards. |
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| Hood or guide appears displaced | From outside the fall zone, report the location and known impact event. | Attachments and concealed assembly components may also need inspection. | Keep people clear and do not remove the hood or guide fasteners. |
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| Cold-weather binding or bottom gap | Report visible threshold ice, daylight, or a changed condition during cold weather. | The observation may involve the astragal, guides, floor condition, or another door issue. | Do not force the curtain through ice or cycle it to test the gap. |
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